| Value | Category | Cases | |
|---|---|---|---|
| 30 | 2 |
8%
|
|
| 50 | 1 |
4%
|
|
| 60 | 1 |
4%
|
|
| 70 | 1 |
4%
|
|
| 77 | refuse | 0 |
0%
|
| 80 | 1 |
4%
|
|
| 88 | don't know | 0 |
0%
|
| 90 | 1 |
4%
|
|
| 99 | missing | 0 |
0%
|
| 100 | 18 |
72%
|
|
| Sysmiss | 4945 |